I thought Utopia is my end game. Cannot resist to try Stellia after it was announced for a few months. It finally arrived today. The first impression is that it is about 98% resolution of Utopia, 120% sound stage and 120% bass. I found driving power affects the bass significantly. When using iFi iDSD in Eco mode, it is able to drive the headphone but with significantly less bass, very similar to Utopia sound signature. However, in Normal and Turbo mode, the Bass is like Bxxts bass heavy headphone, a bit too over bloated. Out of curiosity, I connect it to my Surface Pro with 3.5mm SE cable, oh my goodness, I never am able to enjoy TOTL headphones with Surface Pro direct drive without using any amp at all! It is very enjoyable. I cannot image any TOTL headphone is able to play so beautifully without amping. What is even more surprising to me is that it is loud! I am using 20% volume(still too loud)! I know it is efficient but not this level. The whole frequency range is full and live. I think Focal designed it for mobile application, no EQ, no amp, no dac, nothing. Just enjoy the music! Next time on trip, I can leave home without carrying any DAC/amp, just Stellia and my Surface Pro! I am very happy with the purchase.